Skin Safe serration (blade that doesn't cut skin)

Wow, but wow, people will never cease to amaze me.

Dear Santa,

I want a lighter that does not burn, and a needle that does not puncture.
And while you're at it, please give some common sense to everyone, seems to be a rarity these days.
 
Others have pointed out that this seems like a solution looking for a problem, but it's worth repeating.

I suppose there is some good in innovation for the sake of innovation. If nothing else, we're finding the limits of the possible.

Practically speaking though, I want a knife with a secure grip, and a sharp blade. I want to know that if I'm not paying attention to what I should be paying attention to, I'm going to get hurt: it helps me stay focused.
 
Many years ago, I got a gimmicky folding 'saw' that was advertised as one that can't cut you, but can saw through branches, metal pipes and bricks without damage to the blade. It was an impulse buy I spotted at a drugstore at one of those 'as seen on TV' displays. I got it purely out of curiosity. Its edge was super-dull by design; I'm not really even sure how to describe it, other than the edge was simply a rough surface that seemed welded(?) to the edge of the blade that was actually thicker than the blade itself.

Well, I never needed to saw a brick or a pipe, but for kicks I tried it on a narrow tree branch, maybe about 2" thick. It did saw a little into it, but it took forever, and the edge became impregnated with stuff from the branch and wouldn't saw any further. The dry gunk from the branch was very hard to clean off of the edge; I'm not sure I ever got that edge really clean. I ended up finishing sawing that tree branch with the wood saw on a SAK hiker, which did it easily. I'm also pretty sure that the metal saw on some SAKs would do a far better job of cutting through metal than that folding saw.

I left it in a drawer, as a lesson to myself about being taken in by a gimmicky device that didn't live up to the hype. I feel kind of embarrassed about it now.

Jim
 
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Remgrit saw I had one of those, just bumpy hard as heck stuff built up for an edge. These actually work on steel fairly well but anything soft or smeary clogged them up like wood or aluminum.
 
James Y said:
Many years ago, I got a gimmicky folding 'saw' that was advertised as one that can't cut you, but can saw through branches, metal pipes and bricks without damage to the blade. It was an impulse buy I spotted at a drugstore at one of those 'as seen on TV' displays. I got it purely out of curiosity. Its edge was super-dull by design; I'm not really even sure how to describe it, other than the edge was simply a rough surface that seemed welded(?) to the edge of the blade that was actually thicker than the blade itself.

Well, I never needed to saw a brick or a pipe, but for kicks I tried it on a narrow tree branch, maybe about 2" thick. It did saw a little into it, but it took forever, and the edge became impregnated with stuff from the branch and wouldn't saw any further. The dry gunk from the branch was very hard to clean off of the edge; I'm not sure I ever got that edge really clean. I ended up finishing sawing that tree branch with the wood saw on a SAK hiker, which did it easily. I'm also pretty sure that the metal saw on some SAKs would do a far better job of cutting through metal than that folding saw.

I left it in a drawer, as a lesson to myself about being taken in by a gimmicky device that didn't live up to the hype. I feel kind of embarrassed about it now.

Jim
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That sounds like the “Remgritsaw” on the Gerber bladeless multitool.
 
I forgot where or when but I saw a "machine" that heated up a wire to melt (separate) nylon rope. Not necessary but if you give some people a sharp instrument they can't help but cut themselves.
 
Bill3152 said:
I forgot where or when but I saw a "machine" that heated up a wire to melt (separate) nylon rope. Not necessary but if you give some people a sharp instrument they can't help but cut themselves.
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Lowes and Home Depot use ( or used to use) hot wire cutters.
 
I've seen similar with medical saws used for removing casts. Takes the cast off and basically just leaves a rug burn if it hits the skin too much. No idea how the blade is designed, the saw apparently vibrates instead of spins. It cuts solid surfaces but not yielding surfaces, from a few brief articles I skimmed to get better info for this post.

No idea how that would work in a knife blade.
 
Cutco does/did this on (at least some of) their steak knives. Blunt tips on the serrations, the sharpened part in the valleys.
 
I saw some scissors in a store with the claim, "Safe for kids, won't cut hair." True to their claim, they just folded the hair on my arm, but they did cut a piece of paper. That, my friends, is a useful innovation.
 
James Y said:
I found the video of the commercial for it; although it's in Spanish, it's obvious what's being said:


Jim
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Yes, it looks like the same principle.
remgrit-blades.jpg
 
I wish I could see the video - Didn't see the link in the post. I have to think that if does not cut skin it wont cut food. The only real application I can see for a knife that doesn't cut skin - but can cut other items is for people with Parkinsons disease or another similar disability.
 
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